lkml.org 
[lkml]   [2012]   [Aug]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2 3/3] backlight: lp855x: remove goto err_sysfs and goto err_dev
On Tue, 07 Aug 2012 18:25:44 +0900
Jingoo Han <jg1.han@samsung.com> wrote:

> This patch removes goto err_sysfs and goto err_dev, which makes code
> a bit smaller.
>
> ...
>
> --- a/drivers/video/backlight/lp855x_bl.c
> +++ b/drivers/video/backlight/lp855x_bl.c
> @@ -272,29 +272,25 @@ static int lp855x_probe(struct i2c_client *cl, const struct i2c_device_id *id)
> if (ret) {
> dev_err(lp->dev, "i2c communication err: %d", ret);
> if (mode == REGISTER_BASED)
> - goto err_dev;
> + return ret;
> }
>
> ret = lp855x_backlight_register(lp);
> if (ret) {
> dev_err(lp->dev,
> "failed to register backlight. err: %d\n", ret);
> - goto err_dev;
> + return ret;
> }
>
> ret = sysfs_create_group(&lp->dev->kobj, &lp855x_attr_group);
> if (ret) {
> dev_err(lp->dev, "failed to register sysfs. err: %d\n", ret);
> - goto err_sysfs;
> + lp855x_backlight_unregister(lp);
> + return ret;
> }
>
> backlight_update_status(lp->bl);
> return 0;
> -
> -err_sysfs:
> - lp855x_backlight_unregister(lp);
> -err_dev:
> - return ret;
> }
>
> static int __devexit lp855x_remove(struct i2c_client *cl)

err, no. We've learned from hard experience that having multiple return
points from a non-trivial function easily leads to resource leaks and
missed unlocks. For this reason, kernel code frequently uses the "goto
out" technique, providing a single site where deallocation and
unlocking occurs.




\
 
 \ /
  Last update: 2012-08-16 21:21    [W:0.034 / U:0.168 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site